net/ceph/debugfs.c

   1 #include <linux/ceph/ceph_debug.h>
   2
   3 #include <linux/device.h>
   4 #include <linux/slab.h>
   5 #include <linux/module.h>
   6 #include <linux/ctype.h>
   7 #include <linux/debugfs.h>
   8 #include <linux/seq_file.h>
   9
  10 #include <linux/ceph/libceph.h>
  11 #include <linux/ceph/mon_client.h>
  12 #include <linux/ceph/auth.h>
  13 #include <linux/ceph/debugfs.h>
  14
  15 #ifdef CONFIG_DEBUG_FS
  16
  17 /*
  18  * Implement /sys/kernel/debug/ceph fun
  19  *
  20  * /sys/kernel/debug/ceph/client*  - an instance of the ceph client
  21  *      .../osdmap      - current osdmap
  22  *      .../monmap      - current monmap
  23  *      .../osdc        - active osd requests
  24  *      .../monc        - mon client state
  25  *      .../client_options - libceph-only (i.e. not rbd or cephfs) options
  26  *      .../dentry_lru  - dump contents of dentry lru
  27  *      .../caps        - expose cap (reservation) stats
  28  *      .../bdi         - symlink to ../../bdi/something
  29  */
  30
  31 static struct dentry *ceph_debugfs_dir;
  32
  33 static int monmap_show(struct seq_file *s, void *p)
  34 {
  35         int i;
  36         struct ceph_client *client = s->private;
  37
  38         if (client->monc.monmap == NULL)
  39                 return 0;
  40
  41         seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
  42         for (i = 0; i < client->monc.monmap->num_mon; i++) {
  43                 struct ceph_entity_inst *inst =
  44                         &client->monc.monmap->mon_inst[i];
  45
  46                 seq_printf(s, "\t%s%lld\t%s\n",
  47                            ENTITY_NAME(inst->name),
  48                            ceph_pr_addr(&inst->addr.in_addr));
  49         }
  50         return 0;
  51 }
  52
  53 static int osdmap_show(struct seq_file *s, void *p)
  54 {
  55         int i;
  56         struct ceph_client *client = s->private;
  57         struct ceph_osdmap *map = client->osdc.osdmap;
  58         struct rb_node *n;
  59
  60         if (map == NULL)
  61                 return 0;
  62
  63         seq_printf(s, "epoch %d\n", map->epoch);
  64         seq_printf(s, "flags%s%s\n",
  65                    (map->flags & CEPH_OSDMAP_NEARFULL) ?  " NEARFULL" : "",
  66                    (map->flags & CEPH_OSDMAP_FULL) ?  " FULL" : "");
  67
  68         for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {
  69                 struct ceph_pg_pool_info *pool =
  70                         rb_entry(n, struct ceph_pg_pool_info, node);
  71
  72                 seq_printf(s, "pool %lld pg_num %u (%d) read_tier %lld write_tier %lld\n",
  73                            pool->id, pool->pg_num, pool->pg_num_mask,
  74                            pool->read_tier, pool->write_tier);
  75         }
  76         for (i = 0; i < map->max_osd; i++) {
  77                 struct ceph_entity_addr *addr = &map->osd_addr[i];
  78                 int state = map->osd_state[i];
  79                 char sb[64];
  80
  81                 seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\t%3d%%\n",
  82                            i, ceph_pr_addr(&addr->in_addr),
  83                            ((map->osd_weight[i]*100) >> 16),
  84                            ceph_osdmap_state_str(sb, sizeof(sb), state),
  85                            ((ceph_get_primary_affinity(map, i)*100) >> 16));
  86         }
  87         for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {
  88                 struct ceph_pg_mapping *pg =
  89                         rb_entry(n, struct ceph_pg_mapping, node);
  90
  91                 seq_printf(s, "pg_temp %llu.%x [", pg->pgid.pool,
  92                            pg->pgid.seed);
  93                 for (i = 0; i < pg->pg_temp.len; i++)
  94                         seq_printf(s, "%s%d", (i == 0 ? "" : ","),
  95                                    pg->pg_temp.osds[i]);
  96                 seq_printf(s, "]\n");
  97         }
  98         for (n = rb_first(&map->primary_temp); n; n = rb_next(n)) {
  99                 struct ceph_pg_mapping *pg =
 100                         rb_entry(n, struct ceph_pg_mapping, node);
 101
 102                 seq_printf(s, "primary_temp %llu.%x %d\n", pg->pgid.pool,
 103                            pg->pgid.seed, pg->primary_temp.osd);
 104         }
 105
 106         return 0;
 107 }
 108
 109 static int monc_show(struct seq_file *s, void *p)
 110 {
 111         struct ceph_client *client = s->private;
 112         struct ceph_mon_generic_request *req;
 113         struct ceph_mon_client *monc = &client->monc;
 114         struct rb_node *rp;
 115         int i;
 116
 117         mutex_lock(&monc->mutex);
 118
 119         for (i = 0; i < ARRAY_SIZE(monc->subs); i++) {
 120                 seq_printf(s, "have %s %u", ceph_sub_str[i],
 121                            monc->subs[i].have);
 122                 if (monc->subs[i].want)
 123                         seq_printf(s, " want %llu%s",
 124                                    le64_to_cpu(monc->subs[i].item.start),
 125                                    (monc->subs[i].item.flags &
 126                                         CEPH_SUBSCRIBE_ONETIME ?  "" : "+"));
 127                 seq_putc(s, '\n');
 128         }
 129
 130         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
 131                 __u16 op;
 132                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
 133                 op = le16_to_cpu(req->request->hdr.type);
 134                 if (op == CEPH_MSG_STATFS)
 135                         seq_printf(s, "%llu statfs\n", req->tid);
 136                 else if (op == CEPH_MSG_MON_GET_VERSION)
 137                         seq_printf(s, "%llu mon_get_version", req->tid);
 138                 else
 139                         seq_printf(s, "%llu unknown\n", req->tid);
 140         }
 141
 142         mutex_unlock(&monc->mutex);
 143         return 0;
 144 }
 145
 146 static int osdc_show(struct seq_file *s, void *pp)
 147 {
 148         struct ceph_client *client = s->private;
 149         struct ceph_osd_client *osdc = &client->osdc;
 150         struct rb_node *p;
 151
 152         mutex_lock(&osdc->request_mutex);
 153         for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
 154                 struct ceph_osd_request *req;
 155                 unsigned int i;
 156                 int opcode;
 157
 158                 req = rb_entry(p, struct ceph_osd_request, r_node);
 159
 160                 seq_printf(s, "%lld\tosd%d\t%lld.%x\t", req->r_tid,
 161                            req->r_osd ? req->r_osd->o_osd : -1,
 162                            req->r_pgid.pool, req->r_pgid.seed);
 163
 164                 seq_printf(s, "%.*s", req->r_base_oid.name_len,
 165                            req->r_base_oid.name);
 166
 167                 if (req->r_reassert_version.epoch)
 168                         seq_printf(s, "\t%u'%llu",
 169                            (unsigned int)le32_to_cpu(req->r_reassert_version.epoch),
 170                            le64_to_cpu(req->r_reassert_version.version));
 171                 else
 172                         seq_printf(s, "\t");
 173
 174                 for (i = 0; i < req->r_num_ops; i++) {
 175                         opcode = req->r_ops[i].op;
 176                         seq_printf(s, "%s%s", (i == 0 ? "\t" : ","),
 177                                    ceph_osd_op_name(opcode));
 178                 }
 179
 180                 seq_printf(s, "\n");
 181         }
 182         mutex_unlock(&osdc->request_mutex);
 183         return 0;
 184 }
 185
 186 static int client_options_show(struct seq_file *s, void *p)
 187 {
 188         struct ceph_client *client = s->private;
 189         int ret;
 190
 191         ret = ceph_print_client_options(s, client);
 192         if (ret)
 193                 return ret;
 194
 195         seq_putc(s, '\n');
 196         return 0;
 197 }
 198
 199 CEPH_DEFINE_SHOW_FUNC(monmap_show)
 200 CEPH_DEFINE_SHOW_FUNC(osdmap_show)
 201 CEPH_DEFINE_SHOW_FUNC(monc_show)
 202 CEPH_DEFINE_SHOW_FUNC(osdc_show)
 203 CEPH_DEFINE_SHOW_FUNC(client_options_show)
 204
 205 int ceph_debugfs_init(void)
 206 {
 207         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 208         if (!ceph_debugfs_dir)
 209                 return -ENOMEM;
 210         return 0;
 211 }
 212
 213 void ceph_debugfs_cleanup(void)
 214 {
 215         debugfs_remove(ceph_debugfs_dir);
 216 }
 217
 218 int ceph_debugfs_client_init(struct ceph_client *client)
 219 {
 220         int ret = -ENOMEM;
 221         char name[80];
 222
 223         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
 224                  client->monc.auth->global_id);
 225
 226         dout("ceph_debugfs_client_init %p %s\n", client, name);
 227
 228         BUG_ON(client->debugfs_dir);
 229         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 230         if (!client->debugfs_dir)
 231                 goto out;
 232
 233         client->monc.debugfs_file = debugfs_create_file("monc",
 234                                                       0600,
 235                                                       client->debugfs_dir,
 236                                                       client,
 237                                                       &monc_show_fops);
 238         if (!client->monc.debugfs_file)
 239                 goto out;
 240
 241         client->osdc.debugfs_file = debugfs_create_file("osdc",
 242                                                       0600,
 243                                                       client->debugfs_dir,
 244                                                       client,
 245                                                       &osdc_show_fops);
 246         if (!client->osdc.debugfs_file)
 247                 goto out;
 248
 249         client->debugfs_monmap = debugfs_create_file("monmap",
 250                                         0600,
 251                                         client->debugfs_dir,
 252                                         client,
 253                                         &monmap_show_fops);
 254         if (!client->debugfs_monmap)
 255                 goto out;
 256
 257         client->debugfs_osdmap = debugfs_create_file("osdmap",
 258                                         0600,
 259                                         client->debugfs_dir,
 260                                         client,
 261                                         &osdmap_show_fops);
 262         if (!client->debugfs_osdmap)
 263                 goto out;
 264
 265         client->debugfs_options = debugfs_create_file("client_options",
 266                                         0600,
 267                                         client->debugfs_dir,
 268                                         client,
 269                                         &client_options_show_fops);
 270         if (!client->debugfs_options)
 271                 goto out;
 272
 273         return 0;
 274
 275 out:
 276         ceph_debugfs_client_cleanup(client);
 277         return ret;
 278 }
 279
 280 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 281 {
 282         dout("ceph_debugfs_client_cleanup %p\n", client);
 283         debugfs_remove(client->debugfs_options);
 284         debugfs_remove(client->debugfs_osdmap);
 285         debugfs_remove(client->debugfs_monmap);
 286         debugfs_remove(client->osdc.debugfs_file);
 287         debugfs_remove(client->monc.debugfs_file);
 288         debugfs_remove(client->debugfs_dir);
 289 }
 290
 291 #else  /* CONFIG_DEBUG_FS */
 292
 293 int ceph_debugfs_init(void)
 294 {
 295         return 0;
 296 }
 297
 298 void ceph_debugfs_cleanup(void)
 299 {
 300 }
 301
 302 int ceph_debugfs_client_init(struct ceph_client *client)
 303 {
 304         return 0;
 305 }
 306
 307 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 308 {
 309 }
 310
 311 #endif  /* CONFIG_DEBUG_FS */
 312
 313 EXPORT_SYMBOL(ceph_debugfs_init);
 314 EXPORT_SYMBOL(ceph_debugfs_cleanup);